【URGENT STOCK】Audio Legend Chips Ready-to-Ship: From the 'Op-Amp King' NE5532 to Flagship DAC AK4499, We Have It All!
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Every Audio Engineer's Dream List: These Discontinued/Scarce Components - We Have Them in Stock!
The global audio chip supply chain is experiencing unprecedented chaos. Lead times for classic in-production chips exceed 52 weeks, discontinued chip prices have surged 10x, and counterfeit rates are as high as 40%. As a professional supplier with 18 years in the audio industry, we have established the "Audio Legend Chips Vault" – dedicated to collecting, testing, and preserving those precious components that defined audio history.
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Part 1: The King of Power Transistors: Massive Stock of 2SA1943/2SC5200
1.1 Genuine Toshiba Originals
【Market Reality】: 90% of so-called "brand new" items in the market are refurbished or counterfeit.
Our Stock Truth:
| Model | Production Year | Package/Batch | Matching Precision | Stock Qty | Status |
|-------|----------------|---------------|-------------------|-----------|--------|
| 2SA1943 | 2025 (Latest Batch) | TO-3P, Factory Sealed | Vbe Matching ≤10mV | 25,000 pairs | ✅ In Stock |
| 2SC5200 | 2025 (Latest Batch) | TO-3P, Factory Sealed | hFE Tolerance ≤5% | 25,000 pairs | ✅ In Stock |
| 2SA1943-O | 2025 (Selected Batch) | TO-3P, Gold Case | Vbe Matching ≤5mV | 65,000 pairs | ✅ In Stock |
| 2SC5200-O | 2025 (Selected Batch) | TO-3P, Gold Case | hFE Tolerance ≤3% | 65,000 pairs | ✅ In Stock |
Matching Service Levels:
```
Grade A Matching (±3%): Suitable for top Hi-End amplifiers
Grade B Matching (±5%): Suitable for high-end Hi-Fi amplifiers
Grade C Matching (±10%): Suitable for commercial audio equipment
```
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Part 2: Op-Amp Legends: From NE5532 to Modern Top-Tier Models
2.1 The "Op-Amp King" NE5532 Series - All Versions
【Historical Review】: Since its introduction in 1979, it defined an entire era of audio standards.
Our Collection of Various Versions:
```
1. Legendary First Edition (1979-1985) - Signetics NE5532N - Gold Case - 120 pcs (Collector's Grade)
2. Classic Mid-Period (1986-2000) - Philips NE5532N - Ceramic Case - 800 pcs
3. Modern Version (2001-Present) - TI NE5532P - Plastic Case - 65,000 pcs
4. Military Specification - NE5532A - Gold Case Mil-Spec - 2,000 pcs
```
2.2 Modern Top-Tier Op-Amps Stock Matrix
| Tier | Model | Brand | Key Specs | Stock | Application |
|------|-------|-------|-----------|-------|-------------|
| Entry-Level | JRC4580D | JRC | 5MHz GBW | 38,000 pcs | Mixers, Consumer Audio |
| Classic | NE5532P | TI | 10MHz GBW | 65,000 pcs | General Audio Design |
| Advanced | OPA1612 | TI | 1.1nV/√Hz | 82,000 pcs | Mic Preamps, ADC Drivers |
| Top-Tier | LME49720 | TI | 0.00003% THD | 10,258 pcs | Hi-End DACs, Phono Stages |
| Flagship | ADA4625 | ADI | 0.000029% THD | 16,000 pcs | Measurement Instruments, Pro Recording |
| Discrete | Sparkos SS2590 | Sparkos | Discrete Design | 750 pcs | Ultimate Upgrades |
2.3 Special Op-Amps: Optimized for Specific Applications
- Low-Noise Op-Amp: AD797 (0.9nV) - 8,200 pcs in stock
- High-Voltage Op-Amp: OPA445 (±45V) - 9,800 pcs in stock
- Current-Feedback Op-Amp: AD811 (140MHz) - 10,000 pcs in stock
- JFET Input Op-Amp: OPA604 (Tube-like Sound) - 9,200 pcs in stock
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Part 3: DAC Chips: From Classics to Modern Flagships
3.1 Legendary DAC Chip Library
【Historical Stock】: These chips defined various eras of digital audio.
| Era | Model | Brand | Resolution | Key Features | Stock |
|-----|-------|-------|------------|--------------|-------|
| 16-bit Era | PCM63P | BB | 16-bit | First true 20-bit performance | 2,000 pcs |
| Multi-bit Era | PCM1704 | TI | 24-bit | Ultimate R2R architecture | 8,200 pcs |
| ΔΣ Revolution | PCM1794A | TI | 32-bit | Modern ΔΣ masterpiece | 10,200 pcs |
| Japanese Flagship | AK4499EQ | AKM | 32-bit | AKM's ultimate creation | 9,800 pcs |
| American Flagship | ES9038PRO | ESS | 32-bit | Current performance king | 6,500 pcs |
| All-Rounder | CS43198 | Cirrus | 32-bit | Cost-performance benchmark | 15,000 pcs |
3.2 AKM vs ESS Ultimate Showdown - In Stock
AKM Camp:
- AK4490EQ: Best Value - 18,000 pcs in stock
- AK4497EQ: Balanced Choice - 9,500 pcs in stock
- AK4499EQ: Flagship Supreme - 9,800 pcs in stock
- AK4458: Multi-Channel Professional - 12,000 pcs in stock
ESS Camp:
- ES9018K2M: Mobile Flagship - 25,000 pcs in stock
- ES9028PRO: Previous Gen Flagship - 4,200 pcs in stock
- ES9038Q2M: New Mobile King - 30,000 pcs in stock
- ES9038PRO: Performance Monster - 6,500 pcs in stock
Cirrus Logic Camp:
- CS4398: Classic Choice - 12,000 pcs in stock
- CS43198: Modern Upgrade - 15,000 pcs in stock
- CS43131: Portable Optimized - 40,000 pcs in stock
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Part 4: Power Amplifier ICs: From Classics to Modern
4.1 Legendary Power Amp ICs Stock
| Model | Brand | Power | Key Features | Stock |
|-------|-------|-------|--------------|-------|
| LM3886 | TI | 68W | Classic National Semiconductor IC Amp | 258,000 pcs |
| TDA7293 | ST | 100W | Representative of "European Sound" | 232,000 pcs |
| TDA7294 | ST | 70W | Mid-Power Classic | 375,000 pcs |
| TDA2030A | ST | 18W | Entry-Level Favorite | 800,000 pcs |
| LM1875 | TI | 25W | Low-Power Classic | 485,000 pcs |
| TPA3255 | TI | 315W | Modern Class-D Flagship | 252,000 pcs |
4.2 The New Era of Class-D Amplifiers
High-Efficiency Class-D Chips:
- TPA3116D2 (50W) - 65,000 pcs in stock
- TPA3251 (175W) - 118,000 pcs in stock
- TPA3255 (315W) - 112,000 pcs in stock
- MA12070 (Purifi Technology) - 35,000 pcs in stock
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Part 5: Professional Audio Processing Chips
5.1 DSP & Audio Processors
- ADSP-21489: SHARC Floating-Point DSP - 2,800 pcs in stock
- ADA1452: Low-Power Audio DSP - 15,000 pcs in stock
- CS48500: Multi-Channel Processor - 7,500 pcs in stock
- PCM9211: Digital Audio Interface - 25,000 pcs in stock
- SRC4392: Sample Rate Converter - 8,200 pcs in stock
5.2 ADC Converters (Core of Recording)
- AK5578: 8-Channel 130dB - 32,070 pcs in stock
- CS5381: 123dB Stereo - 12,000 pcs in stock
- PCM4222: 129dB High Performance - 45,090 pcs in stock
- AD7768: Industrial-Grade High Performance - 28,000 pcs in stock
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Part 6: Scarce Passive Components & Supporting Chips
6.1 Audio-Specific Capacitors (NOS Stock)
- ELNA Silmic II: Audio-Specific Electrolytic - 510,000 pcs in stock
- Nichicon FG: Fine Gold Series - 485,000 pcs in stock
- WIMA FKP2: Film Capacitors - 1,120,000 pcs in stock
- Mundorf Supreme: Audiophile-Grade Capacitors - 80,000 pcs in stock
6.2 Volume Control & Switches
- PGA2311: Digital Volume Control - 25,000 pcs in stock
- CS3310: Professional Volume Control - 18,000 pcs in stock
- NJW1195: Analog Volume Control - 22,000 pcs in stock
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Part 7: Why Choose Us? – Professional Services from Audio Experts
7.1 Technical Support System
```
Pre-Purchase: Selection Consultation + Solution Comparison + Sample Testing
During Purchase: Parameter Matching + Aging Tests + Quality Verification
Post-Purchase: Reference Designs + Failure Analysis + Alternative Solutions
```
7.2 Audio Laboratory Services
Value-Added Services We Provide:
- THD+N Testing: Verify actual performance metrics
- Matching Service: Precision matching for transistors/op-amps
- Listening Tests: Subjective sound quality evaluation
- PCB Review: Optimize your circuit layout
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Part 8: Obtaining Stock & Technical Support
8.1 How to Get Scarce Chips
2. Technical Consultation: Free selection advice, alternative solutions
3. Sample Application: Qualified customers can apply for free samples
8.2 Services for Different Customer Types
DIY Enthusiasts:
- Small quantity supply (from 1 piece)
- Free technical guidance
- Kit solution recommendations
Small & Medium Manufacturers:
- Stable bulk supply
- Price protection agreements
- Joint design solutions
Major Brand Manufacturers:
- Strategic stock reservation
- Annual supply agreements
- Custom testing services
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Part 9: Special Warning: Audio Component Purchasing Pitfalls
9.1 Common Counterfeit Identification
```
2SA1943/2SC5200 Counterfeit Signs:
1. Laser marking blurry, inconsistent depth
2. Uneven pin plating, signs of oxidation
3. Lighter weight (genuine approx. 18g)
4. On-board test Vceo below 200V
NE5532 Counterfeit Signs:
1. Rough printed text
2. Uneven pin spacing
3. Abnormal quiescent current
4. Noise specs not meeting standards
```
9.2 Alternative Strategies for Discontinued Chips
```
Original Model → Direct Replacement → Upgrade Replacement → Redesign
PCM1794A → CS43198 → ES9038Q2M → Discrete R2R Design
NE5532 → OPA1656 → OPA1612 → Discrete Op-Amp
2SA1943 → NJW0281 → Exicon MOSFET → GaN Transistors
```
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Part 10: Take Action Now: Don't Let Chip Shortages Kill Your Audio Dreams
Scarce Chip Fast-Track
【WHATSAPP】: [+86 17727447325]
【EMAIL】: [chenchunrui6@gmail.com]
【PROMISE】: All audio-related inquiries receive technical solutions within 1 hours.
The Ultimate Safeguard for Audio Engineers
In this era of component shortages, we are not just suppliers, but **guardians of audio technology. From the NE5532 of 1979 to the ES9038PRO of 2023, we preserve the complete memory of audio evolution.
Remember: True audio quality begins with genuine components. Don't let your design be ruined by a fake chip.
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This stock list is updated in real-time. Last Updated: February 6, 2026. All components guaranteed 100% original and genuine. Counterfeit? Tenfold compensation. Free technical consultation. Audio enthusiasts, engineers, and manufacturers are welcome to exchange and collaborate.*